<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>window screen</title>
</head>
<body>
	<script type="text/javascript">
		/**
		 *	screen.availWidth - 可用的屏幕宽度
			screen.availHeight - 可用的屏幕高度
			1920 * 1080
		 * 
		 */
		
		alert(screen.availWidth);

		alert(screen.availHeight);

	</script>
</body>
</html>